public function testCanSetPasswordWhenSettingCert()
{
$path = __FILE__;
$res = $this->getSendResult(['cert' => [$path, 'foo']]);
$opts = stream_context_get_options($res->getBody()->detach());
$this->assertEquals($path, $opts['ssl']['local_cert']);
$this->assertEquals('foo', $opts['ssl']['passphrase']);
}